14 



costa short; termen strongly curved, round, scalloped; tornus promi- 

 nent but rounded; dorsum straight; abdominal fold in rf moderately 

 broad, lined within with a cottony scent- organ. Antennae elongate, 

 club curved ; thorax and abdomen robust, the latter very massive ; 

 $ anal valves very large and prominent. Pupa, unlike that of 

 the other groups of the geniis, sustained by separate lateral 

 threads attached to a tubercle on each side and not by a loop 

 round the middle. 



Key to tlie forms of the Ornithoptera Group. 



a. Underside of hind wing : cell yellow, black only 



at extreme base. 



a'. Underside of hind wing : interspace 1 yellow, 

 with a large oval and a smaller black spot in 

 terminal third, or yellow with posterior half 

 diagonally black. 

 2 . Underside of hind wing black along costal , T> 7 , 



margin, extended into interspace 7 ...... K 1 JJE ^A 



V. Underside of hind wing black along costal ' cetbenis > P- 14 - 



margin, not extended into interspace 7 . . P. ceacris, p. 15. 

 I'. Underside of hind wing : interspace 1 black, 



with a narrow yellow streak anteriorly .... P. minos, p. 10. 



b Underside of hind "wing : cell black ; apex only 



yellow, basal half at least black ............ P. darsius, p. 17. 



a. Underside of hind wing : interspace 7 black, no i p / / , 



yellow spot at its base .................... \ ' l / u ' , , 



b. Underside of hind wing : interspace 7 black, with ' rus ' P' J4< 



a small yellow spot at its base. 

 a. Cell yellow, basal third only black ........ P. ceacus, p. 15. 



b'. Cell black, apex only yellow ............. P. darsius, p. 17. 



c. Underside of hind wing: interspace 7 black, with 



a large yellow spot at base or basal half yellow. P. minos, p. 16. 



485. Papilio helena, Linn. Si/st. Nat. ed. x, 1758, p. 461. 



Race cerberus (PI. XI, fig. 82). 



Papilio pompeus, Gray (nee Cramer), Cat. Lep. Ins. Brit. Mus. i, 



1852, p. 5; Moore (nee Cramer, Ornithoptera), Cat. Lep, Mus. 



E. I. C. i, 1857, p. 87, <$ $ ; Ehves (nee Cramer, Ornithoptera), 



Trans. Ent. Soc. 1888, p. 422. 

 Papilio cerberus, Felder, Verh. zool.-bot. Ges. Wien, xiv, 1864, 



p. 291 ; Moore (Ornithoptera), Lep. Ind. v, 1901-1903, p. 145, 



pi. 490, figs. 1,1 a-lc, <J$. 

 Ornithoptera heliaconoides, Moore, P. Z. S. 1877, p. 592 ; W.-M. 



8f de N. J. A. S. B. 1880, p. 237 ; Moore, Lep. Ind. v, 1901- 



1903, p. 147, pi. 491, figs. 1, 1 -l c, <$ $ . 

 Troides helena cerberus, liothsch. Nov. Zool. ii, 1895, p. 219, J $ . 



Race cerberus, Felder. S . Upperside : fore wing rich velvety 



